ASTM D5539-14
- Standard Specification for Seed Starter Mix
- standard by ASTM International, 11/01/2014
- Category: ASTM
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1.1 This specification covers the material characteristics, physical requirements, and sampling appropriate to the designation of a soil or soil-like material for seed starting purposes. This would consist of the duration of germination ending after the cotyledon stage (at the opening of the first true leaves).
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